ISL8225MEVAL2Z Intersil, ISL8225MEVAL2Z Datasheet - Page 3

• Manufacturer Part Number: ISL8225MEVAL2Z
• Description: Power Management IC Development Tools 90A,1.2Vout Eval Brd w/ 3 ISL8225M Modul.
• Manufacturer: Intersil
• Type: DC/DC Converters, Regulators & Controllersr

Specifications of ISL8225MEVAL2Z

• Rohs: yes
• Product: Evaluation Boards
• Tool Is For Evaluation Of: ISL8225M
• Input Voltage: 4.5 V to 20 V
• Output Voltage: 1.2 V
• Output Current: 90 A
• For Use With: ISL8225M

Remote Sensing
The ISL8225MEVAL2Z board allows the user to apply the remote
sensing function to loads in order to achieve good output
regulation accuracy. To make use of this function, remove
resistors R7 and R8 and connect the kelvin sensing lines through
the jumper JP4 (RS) to the point of load.
3. To avoid noise coupling, we recommend adding 1nF
4. Place the modules evenly on the board and leave enough
5. If the ambient temperature is high or the board space is
MODE
5A
5B
7A
8
capacitors on all COMP and ISHARE pins of each module for
multiple module operations.
space between modules. If the board space is limited, try to
put the modules with low power loss closely together (i.e. low
V
loss.
limited, airflow is needed to dissipate more heat from the
modules. A heat sink can also be applied to the top side of the
module to further improve the thermal performance (heat
sink recommendation: Aavid Thermalloy, part number
375424B00034G, www.aavid.com).
OUT
or I
EN2
(I)
0
1
1
OUT
1
ST
) while still separating the module with high power
EN3
MODULE (I = INPUT; O = OUTPUT; I/O = INPUT AND OUTPUT, BI-DIRECTION)
(I)
0
1
0
VSEN2-
Cascaded Module Operation MODEs 5A+5A+7A+5A+5A+5A/7A, No External Clock Required
V
V
V
(I)
CC
CC
CC
MODE
3
GND
GND
V
(I)
CC
VSEN2+
TABLE 2. ISL8225M 3-MODULE BOARD OPERATION MODES
V
(I)
CC
-
-
WRT 1
CLKOUT/REFIN
Application Note 1789
60°
60°
90°
ST
(I OR O)
Both Channels
Both Channels
Both Channels
REPRESENTS
ISHARE (I/O)
CHANNEL(S)
CURRENT
WHICH
Phase-shift Programming
In current sharing mode, the phase-shift is needed to interleave
the different phases to lower the input and output ripples. As
shown in Table 2, there are different sharing modes from
2-phase (180
6-phase (60
signal to the SYNC pin of the second module with the phase-shift
to its own clock signal. Then the second module synchronizes to
the CLKOUT signal of the master module and sends its CLKOUT
signal to the third module’s SYNC pin. The individual 2 phases of
each module are set to be 180
evaluation board is set to mode 5B with 60
phases.
If the MODE pin is not tied to VCC (5A or 5B), all VMON pins of
different modules can be tied together, except the VMON pin of
the master phase. If mode 7A is needed to allow for 90
phase-shift, the MODE pin has to tie to VCC. In this case, the
VMON pin of the associated module needs to be separated by
connecting a 1.05kΩ resistor to SGND, as shown in the
ISL8225M
2
ND
CHANNEL WRT
datasheet.
°
1
180°
180°
180°
°
phase-shift). The master module sends the CLKOUT
ST
phase-shift) and 4-phase (90
(O)
OPERATION
MODES OF OPERATION
MODULE
5A or 7A
OF 2
MODE
5B
-
°
ND
phase-shift by default. This
OPERATION
MODULE
OF 3
MODE
°
5B
-
-
°
phase-shift between
RD
phase-shift) to
December 3, 2012
12-Phase
6-Phase
OUTPUT
2-Phase
4-Phase
°
AN1789.0